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Should I replace my GPS with my cell phone?

from U.S. EPA (blog)

From Oct. 30, 2012: From Casey J. McLaughlin: Walking around Washington D.C. recently, I thought to myself, this is just like walking in the woods! No really, I made the connection because I was trying to use GPS navigation and not having great luck (it could be my service, but I am also illustrating a point). Cities and forests contain tall objects that obscure those magical satellites. Now my phone IS smart and does not rely solely on GPS satellites but also calculates my location using cell towers and Wi-Fi base stations. more

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